A cable epoxy sealing structure

Abstract

The present application discloses a cable epoxy sealing structure, which relates to the field of cable sealing structures. The structure comprises a cable sheath and a cable, wherein the cable sheath is provided with a through cavity and a glue filling cavity interconnected with each other; the cable comprises a plurality of wire cores and a protective sheath enclosing the plurality of wire cores; the protective sheath passes through the through cavity and extends into the glue filling cavity, and one end of the protective sheath located in the glue filling cavity is provided with a cut-off opening, through which each wire core passes, and the cut-off opening is sealed with sealant; each wire core is enclosed in an insulation layer, and a partition is provided at a section of the insulation layer of each wire core located in the glue filling cavity; a first heat shrink tube is enclosed at a section of the insulation layer of each wire core located in the glue filling cavity, and the glue filling cavity and each first heat shrink tube are filled with epoxy glue. By sealing the cut-off opening with sealant instead of the traditional independent sealing ring, and stripping a partition from the insulation layer to replace the traditional copper pin connection method, the sealing performance of the cable and the convenience of cable sealing operation are improved.

Description

Technical Field

[0001] The present application relates to the field of cable sealing structures, and more particularly, to a cable epoxy sealing structure. Background Art

[0002] For sewage pumps, deep well pumps and other pump bodies that are in a humid environment for a long time, the power supply cables need to have good sealing properties to ensure that the sewage pumps, deep well pumps and other pump bodies maintain stable operation.

[0003] To reduce the possibility of moisture penetrating into the cable through the cable ends, traditional cables use independent sealing washers to seal the gaps between the cores. However, independent sealing washers are difficult to install between the cores, which can easily cause the epoxy glue to leak into the gaps between the cores and solidify there. When the cable is bent, the solidified epoxy glue can easily cause the insulation layer of the cable core to rupture, resulting in short circuits and leakage. In addition, before epoxy glue is injected into traditional cables, the cable cores must be cut first and then connected with copper needles. The copper needle connection requires the use of a punching machine. This structure has high operational requirements and poses safety risks, and needs to be improved. Summary of the Invention

[0004] In order to improve the sealing performance of the cable and the convenience of cable sealing operation, the present application provides a cable wire epoxy sealing structure.

[0005] This application provides a cable epoxy sealing structure, which adopts the following technical solutions:

[0006] A cable epoxy sealing structure includes a cable sheath and a cable, wherein the cable sheath is provided with a through cavity and a glue filling cavity which are interconnected;

[0007] The cable comprises a plurality of wire cores and a protective sheath covering the plurality of wire cores;

[0008] The protective cover passes through the through cavity and extends into the glue pouring cavity. One end of the protective cover located in the glue pouring cavity is provided with a cut-off opening. Each of the wire cores passes through the cut-off opening, and the cut-off opening is sealed with sealant.

[0009] Each of the wire cores is wrapped with an insulating layer, and a section of the insulating layer of each wire core located in the glue pouring cavity is provided with a partition, and the partition is formed by stripping the insulating layer; a section of the insulating layer of each wire core located in the glue pouring cavity is wrapped with a first heat shrink tube, and the glue pouring cavity and each first heat shrink tube are filled with epoxy glue.

[0010] Through the above technical solution, the cut end is sealed with sealant instead of the traditional independent sealing ring. Since the sealant has good fluidity before solidification, it can better seal the gap between the wire cores than the independent sealing ring, and has better sealing performance, and can more effectively reduce the penetration of epoxy glue into the wire core gap in the protective sheath; and a partition is peeled off on the insulation layer to replace the traditional copper needle connection method, so that the epoxy glue penetrates into the wire core at the partition. After the epoxy glue solidifies, a water-blocking layer is formed at the partition, reducing the possibility of water vapor penetrating through the wire core, making the overall sealing of the cable better, and compared with the traditional copper needle connection method, the operation of peeling off the partition on the insulation layer is more convenient;

[0011] In addition, a first heat shrink tube is wrapped around the outer ring of each insulation layer to block contact between adjacent wire cores and reduce the possibility of short circuit and leakage.

[0012] Optionally, an outer ring of the protective sleeve located in the glue-filling cavity is wrapped with a second heat shrink tube.

[0013] Through the above technical solution, a second heat shrink tube is set to wrap the end of the protective sleeve located in the glue filling cavity, thereby reducing the contact between the protective sleeve and the epoxy glue, and reducing the possibility of the protective sleeve breaking after the epoxy glue is cured, so that the integrity and sealing of the protective sleeve are better, and thus the overall sealing of the cable is better.

[0014] Optionally, an annular boss is provided on the inner wall of the glue pouring cavity.

[0015] Through the above technical solution, an annular boss is provided, and after the epoxy glue is filled into the glue filling cavity and solidified, an annular groove matching the annular boss is formed. The annular groove and the annular boss cooperate with each other, which can effectively reduce the axial movement of the epoxy glue after solidification relative to the glue filling cavity, so that the structural stability of the epoxy glue after solidification is better, thereby ensuring the overall sealing of the cable, making the overall sealing of the cable better.

[0016] Optionally, the inner wall of the glue pouring cavity is provided with a plurality of annular ribs.

[0017] Through the above technical solution, annular ribs are provided, and epoxy glue is actually filled in the glue filling cavity. After the epoxy glue is cured, an annular embedding groove that cooperates with the annular ribs can be formed. By the mutual fit of the annular ribs and the annular embedding groove, the structural stability of the solidified epoxy glue relative to the glue filling cavity is enhanced.

[0018] Optionally, the plurality of annular ribs are evenly distributed along the axial direction on the inner wall of the glue pouring cavity.

[0019] Through the above technical solution, the multiple annular grooves formed between the epoxy glue and the multiple annular ribs after solidification in the glue filling cavity are more evenly distributed in the axial direction, thereby making the supporting force exerted on the solidified epoxy glue more evenly distributed in the axial direction, thereby improving the overall stability.

[0020] Optionally, an abutment ring is provided at the connection between the through cavity and the glue pouring cavity, and the abutment ring abuts against the outer ring of the protective sleeve;

[0021] One end of the second heat shrink tube close to the through-cavity opening is sealed and fixed to the abutment ring.

[0022] Through the above technical solution, the abutment ring abuts against the outer ring of the protective sleeve, and the second heat shrink tube and the abutment ring are sealed and fixed, so that the connection between the through cavity and the glue pouring cavity is sealed, reducing the penetration of epoxy glue relative to the through cavity and ensuring the sealing of the glue pouring cavity relative to the through cavity.

[0023] Optionally, the outer ring of the cable sheath is provided with an abutment bevel, the axial position of the abutment bevel is arranged corresponding to the axial position of the abutment ring, and the diameter of the abutment bevel gradually increases from the through cavity to the glue filling cavity;

[0024] The cable sheath is provided with a locking nut, and the locking nut is used to connect the pump body. A locking gasket is provided between the locking nut and the abutting inclined surface. The inner ring of the locking gasket is provided with a locking inclined surface that matches the abutting inclined surface.

[0025] Through the above technical solution, a tightening nut and an abutting bevel are provided. When the cable sheath is actually installed, the tightening nut needs to be tightened in conjunction with the threaded hole on the pump body. After the tightening nut is tightened, the tightening nut can press the tightening bevel on the tightening gasket against the abutting bevel, so that the tightening bevel applies a tightening force to the abutting bevel. The radial component of the tightening force will act on the tightening ring, so that the inner ring of the tightening ring is pressed tighter against the outer ring of the protective sleeve, thereby improving the sealing of the glue filling cavity relative to the through cavity.

[0026] Optionally, the cavity wall of the glue-filling cavity close to one end of the through cavity is an inner bevel, the inner bevel and the abutting bevel are both frustum surfaces, and the angle between the generatrix of the inner bevel and the axis is equal to the angle between the generatrix of the abutting bevel and the axis.

[0027] Through the above technical solution, an inner bevel is provided so that the angle between the generatrix of the inner bevel and the axis is equal to the angle between the generatrix of the abutting bevel and the axis, that is, the axial cross-sectional surface of the inner bevel is parallel to the axial cross-sectional surface of the abutting bevel, and then the abutting bevel on the abutting gasket applies a clamping force to the abutting bevel, and the clamping force acts on the inner bevel, and then acts on the epoxy glue through the inner bevel, forming a tightening force on the epoxy glue away from the through-cavity, reducing the gap between the epoxy glue and the inner bevel, and making the sealing between the glue filling cavity and the through-cavity better.

[0028] Optionally, a rubber ring is provided in the glue pouring cavity, the outer ring of the rubber ring is pressed against the inner wall of the glue pouring cavity, and the inner ring of the rubber ring is pressed against the outer rings of the first heat shrink tube and the outer rings of the second heat shrink tube;

[0029] The epoxy glue in the glue pouring cavity is filled in the rubber ring sleeve.

[0030] Through the above technical solution, a rubber ring sleeve is provided. Since the solidified epoxy glue will shrink, expand and crack under different working environments, there is a certain possibility that the overall sealing performance of the cable will be reduced. By filling the epoxy glue in the first heat shrinkable tube into the rubber ring sleeve, the epoxy glue will expand after solidification, and will squeeze the rubber ring sleeve, so that the rubber ring sleeve is compressed, and the expanded epoxy glue can press the rubber ring sleeve against the inner wall of the glue filling cavity, the outer ring of the first heat shrinkable tube and the outer ring of the second heat shrinkable tube respectively; then, when the solidified epoxy glue shrinks, the rubber ring sleeve can rely on its own elasticity to compensate for the shrinkage of the epoxy glue; when the solidified epoxy glue expands, the rubber ring sleeve can be compressed and compensate for the expansion of the epoxy glue, so that the overall sealing performance of the cable is less affected by environmental conditions and has better adaptability.

[0031] Optionally, the inner ring and the outer ring of the rubber ring sleeve are both provided with a plurality of glue injection holes.

[0032] Through the above technical solution, a plurality of glue pouring holes are provided. When the rubber ring sleeve is filled with epoxy glue, a portion of the epoxy glue can seep out of the rubber ring sleeve through the glue pouring holes and contact the inner wall of the glue pouring cavity, the outer ring of the first heat shrinkable tube and the outer ring of the second heat shrinkable tube. Since the epoxy glue has a strong adhesion force, the structural stability among the rubber ring sleeve, the solidified epoxy glue, the inner wall of the glue pouring cavity, the outer ring of the first heat shrinkable tube and the outer ring of the second heat shrinkable tube can be improved.

[0033] Optionally, a plurality of separation rings are sequentially provided in the rubber ring sleeve along the axial direction, and each separation ring has a plurality of glue injection ports distributed along the circumferential direction.

[0034] Through the above technical solution, a separation ring and a glue filling port are set. After the actual epoxy glue is filled and solidified in the rubber ring sleeve, the separation ring can separate the epoxy glue into layers, which can effectively reduce the impact of cracking of a certain layer of epoxy glue on other layers of epoxy glue, and further effectively reduce the impact of cracking of epoxy glue on the overall sealing, so that the overall cable has better adaptability to various working conditions.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] (1) By setting a partition, a first heat shrink tube, and a second heat shrink tube, the cut end is sealed with a sealant instead of an independent sealing ring, and a partition is formed by stripping the insulation layer to replace the traditional copper needle connection method, so that the overall sealing of the cable is better and the production of the sealing structure is more convenient;

[0037] (2) By providing annular ribs, epoxy glue is actually filled in the glue filling cavity. After the epoxy glue is cured, an annular embedding groove that cooperates with the annular ribs can be formed. The mutual fit between the annular ribs and the annular embedding groove enhances the structural stability of the solidified epoxy glue relative to the glue filling cavity.

[0038] (3) By setting an inner bevel, the angle between the main line of the inner bevel and the axis is equal to the angle between the main line of the abutting bevel and the axis, that is, the axial cross-sectional surface of the inner bevel is parallel to the axial cross-sectional surface of the abutting bevel, and then the abutting bevel on the abutting gasket applies a clamping force to the abutting bevel. The clamping force acts on the inner bevel, and then acts on the epoxy glue through the inner bevel, forming a tightening force on the epoxy glue away from the through-cavity, reducing the gap between the epoxy glue and the inner bevel, and making the sealing between the glue filling cavity and the through-cavity better. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the overall structure of this embodiment.

[0040] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A.

[0041] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point B.

[0042] Figure 4 This is a schematic diagram of the overall structure of Example 2.

[0043] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point C in the middle.

[0044] Figure numerals: 1. cable sheath; 2. cable wire; 21. wire core; 22. insulation layer; 23. protective cover; 3. through cavity; 4. glue pouring cavity; 41. inner bevel; 5. cut-off port; 6. sealant; 7. partition; 8. first heat shrink tube; 9. second heat shrink tube; 10. annular boss; 11. annular rib; 12. abutting ring; 13. abutting bevel; 14. fastening nut; 15. fastening gasket; 16. fastening bevel; 17. rubber ring sleeve; 18. glue pouring hole; 19. separator ring; 20. glue pouring port. DETAILED DESCRIPTION

[0045] The present application is further described in detail below with reference to the accompanying drawings.

[0046] The embodiment of the present application discloses an epoxy sealing structure for cables.

[0047] Example 1

[0048] Reference Figure 1 , including a cable sheath 1 and a cable line 2.

[0049] Reference Figure 1 The cable sheath 1 is provided with a through cavity 3 and a glue potting cavity 4 that are interconnected along the axial direction. The cable line 2 includes a plurality of cores 21, an insulating layer 22 wrapped around the outer ring of each core 21, and a protective sheath 23 located around the outer ring of the insulating layer 22 of all cores 21.

[0050] Reference Figure 1 The protective sleeve 23 passes through the through cavity 3 and extends into the glue potting cavity 4. The end of the protective sleeve 23 extending into the glue potting cavity 4 is provided with a cut-off opening 5, which is formed by peeling off the protective sleeve 23. Each wire core 21 and the insulating layer 22 wrapped around the outer ring of the wire core 21 pass through the cut-off opening 5 and pass through the glue potting cavity 4 from the cavity opening at the end of the glue potting cavity 4 away from the through cavity 3. The cut-off opening 5 is blocked with a sealant 6. A partition 7 is provided on a section of the insulating layer 22 wrapped around the outer ring of each wire core 21 located within the glue potting cavity 4. The partition 7 is formed by peeling off the insulating layer 22. The insulating layer 22 wrapped around the outer ring of each wire core 21 is located in the glue filling cavity 4 and is wrapped with a first heat shrink tube 8. The inside of the first heat shrink tube 8 and the space between the corresponding insulating layer 22 are filled with epoxy glue. After the epoxy glue is filled, it will penetrate into the inside of the wire core 21 at the partition 7. After the epoxy glue solidifies, the solidified epoxy glue will form a water-blocking layer at the partition 7, effectively reducing the penetration of water vapor through the inside of the wire core 21, thereby improving the overall sealing effect of the cable. Compared with the sealing structure of the traditional copper pin connection, the method of forming the partition 7 by stripping the insulating layer 22 is more convenient and safer in operation. Moreover, the first heat shrink tube 8 wrapped around the outer ring of the insulating layer 22 of each wire core 21 can separate the wire cores 21 from each other, which can effectively reduce the contact between the wire cores 21 and the wire cores 21 in the glue filling cavity 4, and reduce the occurrence of short circuits and leakage.

[0051] Reference Figure 1 and Figure 2 The outer ring of the protective sleeve 23, located within the glue potting cavity 4, is wrapped with a second heat shrink tubing 9. The glue potting cavity 4 is filled with epoxy glue. Filling the glue potting cavity 4 with epoxy glue effectively blocks moisture from entering through the cavity opening 4, reducing moisture contact with various parts of the cable. Since the epoxy glue solidifies after cooling and expands to a certain extent, the separate second heat shrink tubing 9 can effectively reduce damage to the protective sleeve 23 caused by the epoxy glue solidifying, thereby improving the integrity and sealing of the protective sleeve 23.

[0052] Reference Figure 1 and Figure 2 The inner wall of the glue potting cavity 4 is integrally formed with an annular boss 10 and a plurality of annular ribs 11. The axis of the annular boss 10 coincides with the axis of the glue potting cavity 4. The annular boss 10 is disposed at the end of the glue potting cavity 4 away from the through-hole 3. The axis of each annular rib 11 coincides with the axis of the glue potting cavity 4. The annular ribs 11 are evenly distributed along the axis between the annular boss 10 and the cavity opening of the glue potting cavity 4 near the through-hole 3. After the epoxy glue in the glue pouring cavity 4 solidifies, an annular groove will be formed between the epoxy glue and the annular boss 10, forming a mutual fit between the annular boss 10 and the annular groove, and a plurality of annular embedding grooves will be formed between the epoxy glue and the plurality of annular ribs 11, forming a mutual fit between the annular ribs 11 and the annular embedding grooves, thereby effectively reducing the axial movement of the epoxy glue solidified in the glue pouring cavity 4 relative to the glue pouring cavity 4, so that the epoxy glue solidified in the glue pouring cavity 4 has better connection stability relative to the glue pouring cavity 4, thereby better ensuring the overall sealing of the glue pouring cavity 4.

[0053] Reference Figure 1 and Figure 3 An abutment ring 12 is integrally provided at the junction of the inner wall of the through-hole 3 and the inner wall of the glue potting cavity 4. The abutment ring 12 abuts against the outer ring of the protective sleeve 23. The end of the second heat shrink tube 9 near the through-hole 3 is sealed and fixed to the axial end face of the abutment ring 12 near the glue potting cavity 4. The outer ring of the cable sheath 1 is provided with an abutment bevel 13. The abutment bevel 13 is located axially outside the abutment ring 12. The diameter of the abutment bevel 13 gradually increases from the through-hole 3 to the glue potting cavity 4. The outer ring of the cable sheath 1 is provided with a tightening nut 14 and a tightening washer 15. The tightening nut 14 is used to connect to the pump body. The tightening washer 15 is located between the end of the tightening nut 14 and the abutting bevel 13. The inner ring of the tightening washer 15 is provided with a tightening bevel 16 that matches the abutting bevel 13. The abutting bevel 13 and the tightening bevel 16 are both frustum surfaces, and the large ends of the abutting bevel 13 and the tightening bevel 16 are both located at one end close to the glue filling cavity 4. When the tightening nut 14 is connected to the pump body and the tightening bevel 16 on the tightening washer 15 is pressed against the abutting bevel 13, the tightening force applied by the tightening bevel 16 to the abutting bevel 13 will generate a radial component of force, which will act on the tightening ring, making the tightening ring press tighter against the outer ring of the protective sleeve 23. The connection between the through cavity 3 and the glue potting cavity 4 is sealed by the abutment ring 12, which can reduce the occurrence of epoxy glue in the glue potting cavity 4 penetrating into the through cavity 3, making the glue potting cavity 4 more sealed and more effectively ensuring the overall sealing and waterproof performance of the cable.

[0054] Reference Figure 1 and Figure 3The wall of the glue-filling cavity 4 near one end of the through-hole cavity 3 is an inner bevel 41. The inner bevel 41 is a frustum. The angle between the generatrix of the inner bevel 41 and the axis is equal to the angle between the generatrix of the abutting bevel 13 and the axis. When the tightening nut 14 is tightened and the tightening bevel 16 abuts against the abutting bevel 13, the inner bevel 41 is subjected to a tightening force from the abutting bevel 13. This tightens the epoxy glue in the glue-filling cavity 4 away from the through-hole cavity 3, reducing the gap between the epoxy glue and the inner bevel 41 and improving the sealing between the glue-filling cavity 4 and the through-hole cavity 3.

[0055] The working principle of this embodiment is as follows: epoxy glue is filled in the glue-potting cavity 4 to form a barrier, reducing the contact between water vapor and the cut-off opening 5, and the outer ring of the insulation layer 22 of each section of the wire core 21 in the glue-potting cavity 4 is wrapped with a first heat shrink tube 8, and epoxy glue is filled in the first heat shrink tube 8, so that the epoxy glue penetrates into the interior of the wire core 21 through the partition 7. After the epoxy glue solidifies, a water-blocking layer is formed at the partition 7, thereby reducing the possibility of water vapor penetrating through the interior of the wire core 21 and improving the overall sealing.

[0056] Example 2

[0057] The difference from the first embodiment is that, referring to Figure 4 and Figure 5 A rubber grommet 17 is disposed within the glue-filling cavity 4. The outer ring of the rubber grommet 17 is fixed to the inner wall of the glue-filling cavity 4, while the inner ring of the rubber grommet 17 is fixed to the outer rings of the first heat-shrink tube 8 and the outer rings of the second heat-shrink tube 9. Both the outer and inner rings of the rubber grommet 17 are provided with a plurality of glue-filling holes 18. Epoxy glue within the glue-filling cavity 4 fills the interior of the rubber grommet 17. The epoxy glue penetrates through the glue-filling holes 18 and the rubber holes within the outer ring of the rubber grommet 17, coming into contact with the inner wall of the glue-filling cavity 4, the outer rings of the first heat-shrink tube 8, and the outer rings of the second heat-shrink tube 9. After the epoxy glue solidifies, it is fixed to the inner wall of the glue-filling cavity 4, the outer rings of the first heat-shrink tube 8, and the outer rings of the second heat-shrink tube 9. This ensures a more stable connection between the glue-filling cavity 4 and the rubber grommet 17 after solidification.

[0058] Reference Figure 4 and Figure 5 The solidified epoxy glue will expand and squeeze the rubber grommet 17, pressing the outer ring of the rubber grommet 17 against the inner wall of the glue-filling cavity 4, and the inner ring of the rubber grommet 17 against the outer rings of the first heat-shrink tube 8 and the outer rings of the second heat-shrink tube 9. When the solidified epoxy glue shrinks under certain working conditions, the rubber grommet 17 can compensate for the shrinkage of the epoxy glue by relying on its own elasticity; when the solidified epoxy glue expands under certain working conditions, the rubber grommet 17 can be compressed and compensate for the expansion of the epoxy glue, making the overall sealing performance of the cable less affected by environmental conditions and better adaptability.

[0059] Reference Figure 4 and Figure 5 Multiple separator rings 19 are integrally arranged along the axial direction between the inner and outer rings of the rubber ring sleeve 17. Each separator ring 19 has a plurality of glue injection ports 20 uniformly formed along the circumference on the axial end surface. The separator rings 19 can separate the epoxy glue in the rubber ring sleeve 17 into layers, effectively reducing the impact of cracking in one layer of epoxy glue on other layers. This can effectively reduce the impact of cracking on the overall sealing performance, making the overall cable more adaptable to various working conditions.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cable epoxy sealing structure, comprising a cable sheath (1) and a cable (2), characterized in that: The cable sheath (1) is provided with a through cavity (3) and a glue filling cavity (4) that are interconnected; The cable (2) comprises a plurality of wire cores (21) and a protective sheath (23) wrapping the plurality of wire cores (21); The protective sleeve (23) passes through the through cavity (3) and extends into the glue injection cavity (4); one end of the protective sleeve (23) located in the glue injection cavity (4) is provided with a cut-off opening (5); each of the wire cores (21) passes through the cut-off opening (5); and the cut-off opening (5) is sealed with a sealant (6); Each of the wire cores (21) is wrapped with an insulating layer (22), and a section of the insulating layer (22) of each of the wire cores (21) located in the glue potting cavity (4) is provided with a partition (7), and the partition (7) is formed by stripping the insulating layer (22); a section of the insulating layer (22) of each of the wire cores (21) located in the glue potting cavity (4) is wrapped with a first heat shrink tube (8), and the glue potting cavity (4) and each of the first heat shrink tubes (8) are filled with epoxy glue; An outer ring of the protective sleeve (23) located in the glue-filling cavity (4) is wrapped with a second heat shrink tube (9); An abutment ring (12) is provided at the connection between the through cavity (3) and the glue injection cavity (4), and the abutment ring (12) abuts against the outer ring of the protective sleeve (23); One end of the second heat shrink tube (9) close to the opening of the through cavity (3) is sealed and fixed to the abutment ring (12); The outer ring of the cable sheath (1) is provided with an abutting bevel (13), the axial position of the abutting bevel (13) is arranged corresponding to the axial position of the abutting ring (12), and the diameter of the abutting bevel (13) gradually increases from the through cavity (3) to the glue injection cavity (4); The cable sheath (1) is provided with a locking nut (14), and the locking nut (14) is used to connect the pump body. A locking gasket (15) is provided between the locking nut (14) and the abutting inclined surface (13). The inner ring of the locking gasket (15) is provided with a locking inclined surface (16) that matches the abutting inclined surface (13).

2. The cable epoxy sealing structure according to claim 1, characterized in that: An annular boss (10) is provided on the inner wall of the glue pouring cavity (4).

3. The cable epoxy sealing structure according to claim 1, characterized in that: The inner wall of the glue pouring cavity (4) is provided with a plurality of annular ribs (11).

4. The cable epoxy sealing structure according to claim 3, characterized in that: The plurality of annular ribs (11) are evenly distributed along the axial direction on the inner wall of the glue-filling cavity (4).

5. The cable epoxy sealing structure according to claim 1, characterized in that: The cavity wall of the glue-filling cavity (4) close to one end of the through cavity (3) is an inner bevel (41), and the inner bevel (41) and the abutting bevel (13) are both frustum surfaces, and the angle between the generatrix of the inner bevel (41) and the axis is equal to the angle between the generatrix of the abutting bevel (13) and the axis.

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